I think this comic is a reaction to momma jokes since my mom’s passed away a few years ago. It’s also inspired by an old In Living Colour sketch called the Wheel of Dozens where contestants told mother jokes based on a certain catagory. While 2 contestants got ones like “yo mamma so greazy” and “yo momma so fat”, the 3rd one kept getting things like “yo momma so good at math” and was thoroughly stumped.